THE OFF-SHELL AXIAL ANOMALY VIA THE GAMMA-ASTERISK-PI(0)-]GAMMA TRANSITION

被引：45
|
作者：
FRANK, MR
MITCHELL, KL
ROBERTS, CD
TANDY, PC
机构：
[1] KENT STATE UNIV,NUCL RES CTR,DEPT PHYS,KENT,OH 44242
[2] ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439
来源：
PHYSICS LETTERS B | 1995年 / 359卷 / 1-2期
关键词：
CHIRAL ANOMALY; NONPERTURBATIVE QCD; PION TRANSITION FORM FACTOR;
D O I：
10.1016/0370-2693(95)01065-X
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The gamma*pi(0) --> gamma form factor, including the extension off the pion mass-shell, is obtained from a generalized impulse approximation within a QCD-based model field theory known to provide an excellent description of the pion charge form factor, This approach implements dressing of the vertices and propagators consistent: with dynamical chiral symmetry breaking, gauge invariance, quark confinement and perturbative QCD. Nonperturbative behavior at the real photon vertex is found to generate a logarithmic correction to the large spacelike-q(2) behavior.
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页码：17 / 22
页数：6
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